The Colors of Light The various colors of the visible spectrum have slightly different wavelengths and refract by a slightly different amount. The Primary colors of the visible spectrum are red, green and blue. Secondary colors are cyan, magenta and yellow.
Homework Seeing colour For example, a red book only reflects red light: White light Only red light is reflected The colour an object appears depends on the colours of light it reflects.
A pair of purple trousers would reflect purple light (and red and blue, as purple is made up of red and blue): Purple light A white hat would reflect all seven colours: White light
Red Filter Magenta Filter Using filters Filters can be used to “block” out different colours of light: